What does riser rated (CMR) Ethernet cable mean? How is this different from "normal" Ethernet cable?Updated a year ago
All Ethernet cables will have a safety rating of some kind if it complies with the NEC/NFPA 70. CM, CMG, and CMX have no fire protection. CMR has mild flame-spreading retardance built in but is not flameproof. CMP (plenum) Ethernet cable is the most fire resistant and will not emit gas toxic smoke if it should burn.